Move command handling and updating off Browser and onto a helper object.

chrome/browser/ui/cocoa/command_observer_bridge.mm

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "chrome/browser/ui/cocoa/command_observer_bridge.h"
+#include "chrome/browser/command_updater.h"
 
 #include "base/logging.h"
 
 CommandObserverBridge::CommandObserverBridge(
     id<CommandObserverProtocol> observer, CommandUpdater* commands)
         : observer_(observer), commands_(commands) {
   DCHECK(observer_ && commands_);
 }
 
 CommandObserverBridge::~CommandObserverBridge() {
   // Unregister the notifications
   commands_->RemoveCommandObserver(this);
 }
 
 void CommandObserverBridge::ObserveCommand(int command) {
   commands_->AddCommandObserver(command, this);
 }
 
 void CommandObserverBridge::EnabledStateChangedForCommand(int command,
                                                           bool enabled) {
   [observer_ enabledStateChangedForCommand:command
                                    enabled:enabled ? YES : NO];
 }